129297012 has 48 divisors (see below), whose sum is σ = 325657920. Its totient is φ = 39691008.

The previous prime is 129297011. The next prime is 129297029. The reversal of 129297012 is 210792921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129297011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99664 + ... + 100952.

It is an arithmetic number, because the mean of its divisors is an integer number (6784540).

Almost surely, 2^129297012 is an apocalyptic number.

129297012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129297012 is an abundant number, since it is smaller than the sum of its proper divisors (196360908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129297012 is a wasteful number, since it uses less digits than its factorization.

129297012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 129297012 is about 11370.8843983219. The cubic root of 129297012 is about 505.6649242072.

The spelling of 129297012 in words is "one hundred twenty-nine million, two hundred ninety-seven thousand, twelve".